Combined coil winding and stretching machine



Aug. 22, l fig o J. WAHLBERG 1,9Z3 89&

COMBINED COIL WINDING AND STRETCHING MACHINE Filed June 29, 1951 4 Sheets-Sheet 1 mum ATTORNEY Aug. 22, 1933. J. \NAHLBERG 1,923,898

COMBINED COIL WINDING AND STRETCHINQMACHINE INVENTOR JOHN WAHLB R6 ATTORNEY Aug. 22, 1933. J WAHLBERG 1,923,898

COMBINED COIL WINDING AND STRETCHING MACHINE Filed June 29, 1931 4 Sheets-Sheet 3 INVENTOR JOHN n Am G ATTORNEY 1933- J. WAHLBEYRG 1,923,898

COMBINED COIL WINDING AND STRETCHING MACHINE Filed June 29. 1931 4 Sheets-Sheet 4 JV .z 6.

' a J? J, F T I7; 1 f .2 Z 7 l l TZZEZEZZEEZZZZZ 'f a" 3 gm;

INVENTOR JRVflVIMQHLBEFE ATTORNEY Patented Aug. .22, {1933 UNTEDSSTATBES,PATENT commas. c0 11., w neries Ann me MACHINE TRETCH "John Wahlberg, "East Orange, N. ljjjass ignor to I 7 Westinghouse Lamp-Company, a Corporation of Pennsylvania Application June 29,1931. seriaiivo. trusses '16 Claims. (c1. 15 3 65).

The present invention relat es to the manufacture of. electrical devices such as incandesceht electric lamps or thelike and relates more particularly to .the formation oi coiled filam'ents of definite lengthffor use in such-devices.

Incandescent electric lamps are manufactured with the light source or. filament either in the form of a straightrelatively long refractory wire or with acoiled filament comprising a fine reiractory wirewound to helical form.

The present invention isfccncerned with the coiled type of filament which is generally knownas a concentrated light source and employed either in a gas-filied or an evacuated bulb.- The production of c'oiled lamp filaments to provide a ligh" source includes :an important. step in the operation of lamp making and such filaments are formed by either of two general winding methods.

First the method of. winding-a filament wire upon a mandrel cutting themandrel supported helix into definite lengths or sections and sub} sequently removing the mandrel to provide coiled filamentary sections to constitute lamp filaments. The second method comprises thecoperation of coiling a filamentary .wire to helical forin'in the absence of a mandrel, which filament is severed into sections of proper length. a i

When a light source or filamentary section is produced for use in a lamp of a given wattage certain conditions must be carefully observed as for examplethe length of the selected filamentary wire contained in the-light source must be exact so that the proper'resistance will be obtained for a given wattage lamp v Furthermore each length of filament must contain a helix having a given number of turns and the pitch of the helix must be maintained uniform and the outside diamet'er'held constant. 1

Although it is possible to providecoiledfila filaments will answer all requirements ,which heretofore'attended lamp manufacture when the filaments were mounted by hand. Commercial conditions, however,'demanding low cost of pro duction make it necessary to speed up operations and it become desirable to provide mations.

,chinesfor automatically mounting coiled secuniform over-all lengths, so that w en positioned Mechanism has been devised for automatically handling the coiled sections. positioning them with respect to th'elead wires or" conductorsof c i a lamp mount or stem and for clamping or weld ing ends of the leadwires to theends of the 60 filament. This automatic'mechanism makes it necessary to maintain filamentarysectionso f to be receivedby the automatic mounting mech a'nism, including means suchas pairs of jaws which grip the ends cf'th'e filament, these jaws may be given a fixedposition and the filame or coiled sections maybe ted thereto without failure or the jaws to, grip the filamentby reason of either too longer toofshort filament lengthsi It will be evident thatwhere the jaws posi V cloned to grip a filamentary sectionof acertain length, any variation in this filament length will resultxin the jaws eitherfailing to grip the end I of the filament or in'the application or" too great 5 a portion of the filament being compressed he 7 tween the jaws. i

For the purpose of producing filaments with predetermined overall lengths it has been found desirabieto produce a filament. of a given and length and thereafter stretch the filament to a predetermined 'pitch'and length;

one type of machine for accomplishing a c'cil stretching operation is shown and'descrihed in Patent nest-.222 for Machine for stretching coils which patent is assigned to the present assignee.

Although the machine "isclcsed in the alcove mentiened patent hasbeenfound satisfactory, to stretch coiled sections/it has becon'zedesirable to provide a more compact mechanism including 9 oi rtain improvements in the construction of parts. and so proportioned and arranged as to applicable as a part of a coilwinding machine preferably a mandrelless coil winding machine, such for exampleas that shown rPatent 1,679,489 01? May 221-1923. Y j I j 1 It is an object of the present inventionto provide a simple. and "compact coil winding and stretching mechanism. A l

a coil stretchingunit operable in conjunction with mechanism for feeding coiled sections,

Another object of the invention is to. provide a coil stretching mechanism which may be operated in synchronism with a coil winding' machine. Another object of the invention is to provide a coil stretching mechanism wherein acarrier is intermittently moved with each actuation of mechanism operating to severanddischarge a coiled section: V

; Anotherobjeet of the invention isflto provideql tween jaws.

Other objects and advantages of the invention will be more clearly understood from the follow ing description together with the accompanying drawings in which r v Fig. 1 isaa perspective view of a coil stretching machine in operative relation to a mandreliess coil winding machine.

Fig. la is a fragmentary view showing, mechanism for severing coiled sections.

the coil stretching mechanism as shown in Fig.

1 but without the coil winding mechanism.

Fig. 3 is, a view taken on line III-III in Fig. Fig. 4 is aview taken on line IV-IV in- Fig. Fig. 5 is a view taken on line V-V in Fig. Fig. 6 isa View taken on line VL-VI in Fig.

Fig. 7 is an enlarged fragmentary.yiewtaken online VII-VII-in Fig. 5, of a part of the coil stretching mechanism showing a coil to be stretched in place and having its endsheld be- Fig. 8 is a view taken on line vnr-avn in Fig. 7 and Fig. 9 is a view taken on line IX-IX I, in Fig. 7.

Although the present coil stretching mecha nism isadapted for use in' connection with a mandrelless coil winding machine, it is obvious that ..the coil stretching mechanism is a cornplete'unit and may be employed in connection with any other mechanism, as for example, means whereby coiled sections are discharged so as to be received by the coil'stretching mechanism and also machines wherein the coil discharge means cooperates with the coil stretcln ing mechanism to cause an actuation of the latter. The coil stretching mechanism may of course he operatedas a unit'and coils may be fed thereto by hand if desirable. For the purpose of clearness the coil stretching mechanism willfirst be described and subsequently its relation and cooperation with a mandrelless coil. winding machine will be set forth. I I I I The. present coil stretching mechanism is indicated in the drawings as a whole by the letter A. As clearly shown in Fig. 2 a machine embodying the present inventionmay comprise a base plate 10 which in the present construction may .be of fibre or other insulating material or of molded bakelitel, V V

The base plate. may-be formed so as to provide a pivoted shelf or support for attachment to a coil winding machine indicated as a whole by the reference letter B. This machine and the cooperative relation between the same and the coil later described. 7

The base plate is provided with a central spindle 11 on which is mounted by means of a tap bolt, a hub 12 of insulating material having a circular cam track 13 mountedonthe flange 14 thereof. The spindle 11 is also provided with an insulative collar 15 to which is secured a flange 16 having an under cam surface' ll. A partially grooved or slotted. cam 18 is secured to the collar 15. The severalcams 1'3, 1'7 and 18 may be adjusted vertically-by means of a knurled thumb nut'19 having an internal thread 21 to engage withflan external "thread 22 on the spindle 11. Within the spindle 11 is an adjuster'rod 23.

The upper end of the rod 23 is provided with a shoulder 25 disposed within an accommodating recess in the thumb nut 19. A tubular extension 26 projects from the shoulder25 through the Fig. 2 is an enlarged vertical sectional view of is disposed atubular end piece 51.

thumb and a stop collar 2'7 is fastened to the end of the projection '26. r

A rotation of the thumb the adjuster rod and a calibrated gauge block 28 is provided to indicate the degreeof movement of the adjuster rod 23. ,Thecam's 1'7 and 18 are secured to the 'insulative collar 15 by tap bolts 29 which, extend through a cylindrical portion 31 of the flange 16' and through a bushing 32 constituting an integral portion of the cam 18.-- The tap bolts 29'are provided with stem portions 33 disposed in apertures 34 provided in the adjuster to permit a relative movement of the cams which are movable with the adjuster rod 23.

nut will raise or lower rod 23, a slot 35 beingprovidedin the spindle 1 1 g From the above it will be evident that the cams 13, l'iand 18'are mounted on the spindle 11 and are secured against relative rotary movement with respect to the spindle but' by reason of the In performing this stretchingoperation the coils are held'in vertical positions as shown and gripped by jaws of what maybe termed coil stretching C77; ployed, ten heads being shownin'the present conheads indicated as a whole'b'ythe reference letter Any number of these heads may beemi struction. Y The heads are mounted on a carrier indicated as a whole bythereference letter D.

consisting of an upper ring or disc 37 and a lower ring or disc 38 held'in space relation bysuitable spacermembers 39. The discs 37 and 38 may be of suitable insulative material as fibre or a molded condensation product. l t

Thecarrier D maybe of circular form having a lower centrally disposed hub 41 which hub in the present construction is threadedly connected at with the disc 38 and is provided with a ratchetwheel 43 and a' toothed retainer or index wheel 44. The hub 41 on which the carrier is mounted rotates about the spindle 11. The spindle 11 is provided with a support plate 45 seated upon the base plate 1% and a pin 16 is provided to lock the plate i5'to the base plate and prevent a rotation. of the spindle 11. The plate 45-cooperates with' a clamping plate 45' thread-- edly connected to the, lower end of the spindle ,11 to hold the spindle in its vertical position.

ri stretching machme will, as above mentioned, be bed As above mentioned a plurality of coil stretchheads areof similarconstruction a description 05 one will answer for all.

- As shown more clearly in Figs. 2, f7, 8 and 9 the coil str tching device may comprise a teleing heads are provided and'inasmuch as these scopic casing 4'7 which may be made of tubular sections, it having been found that glass tubing is satisfactory although other materialmay be employed. The casing may comprise an outer or enlarged tubular section 13 having its ends secured in opposed surfaces of discs 37 and 38. Extending intothe tube i8 is a lower tubular end piece ,49 and at the upper end of the tubing '48 The tubular pieces 49 and 51 are disposed in telescopic arrangement within the tubes and a" helical spring 52v disposed within the casing serves to move the tubing 51 to a normal given position.

' The coiled section 36'is fed throug'h-a chute or guide 53 so that it drops into the casing Wand within the c'oiled' spring 52. "During the opera tiori'of stretching the coiled filamentary sectionsince by reason of the-telescopic arrangement the casing will accommodate itself to'the lengthening of the coiled section under the stretching' operation.

Each coil stretching device includes upper gripper members 54 and lower gripper members 55; See Figs. '7 and 8). The lower gripper members are not movable to stretch'the coiled section and only operate to gripthe lower end of the coil and hold it while the upper gripper members are moved upwardly. I

.The upper gripper members as shown in Fig. 9 comprise a pair of lever members 56 and 57 pivoted at 58. Arms 59 and 61 of the lever membersare provided with a notch 62 and a contact face 63 respectively to grip the end of the coiled section. The levers 56 and 57 of the grippermembers are arranged to providea scissor action sothat movement ofthe arms of a pair toward each other causes similar movement of the'opposite arms. 3

Arms 64 and 65 ofth gripper members are normally urged towardeach other by a spring 66 opposite ends of-which are secured'to opposite arms. "The jaws are thus normallyfl urged closed and are openedat the prcpertime by a in 67 which'is moved betweenthe arms 65 and 64 whichpin is carried on a'slide plate 68 slidahle through a head 69 in which the'gripper members are mounted. The'pin 67 is so arranged on the slide plate as to engage with cam 18, which cam is provided with -a lateral surface '71 to move the pin inwardly between the arms 64 and 65 and a track or guide portion 72 is provided' to retract or withdraw the pin thus permitting the jaws to open.

Themovement of the slide plate in the head operates to position an aperture 73 "provided in the slide plate over the jaws 62 and 63 so that a filamentary section'SG passing from thechute 53 may drop into the casing 47. At the time the be. stretched.

aperture 73 is disposed overthe jaws the pin- 67 operatestc maintain the jaws open. 'When the slide plate 63 retracts, the jaws grip the filamentary section thus leaving it in readiness to The stretching operation is performed by a movement of the head 69 which carries the upper gripper members 54. This head is provided with a plunger'74 extending through a suitable bearing 75 in the disc 37. The lower end 76 of the plunger is disposed incontact with the. camsurface 13 so'that a relative movement between the plunger and the cam surface will causethe plunger to be'elfevated thus elevating the head, changing the distance between the gripper members 54: and-5 5.

members 55 secure the lower end of the coiled filamentary section. The lower gripper members,

asshownin Fig. 4, may'comprise apair oi? lever members Y78 and 79 pivoted'at 81 and-having a scissor'action. l I

- These jaws are normally held closed by asuitable spring 82and are caused to openby a move merit of pin 83- mounted on a slide plate 84.; The slide plate B l-is provided with an" aperture 85 and a oam follower 86 arranged to'travclin a cam track 87 provided on the base plate 10. The slide plate .84 is normally positioned. beneath the jaws s'oas to provide a support for the end of a filamentary section when it is dropped into the-Icesing 47 which end is thus positioned between the grippingsurfaces 88 and 89 of the lower gripper members. As the carrier rotates the cam follower rides in the'oam track 87 consisting-of guide surfaces 91 and 92 so that the {platej84 will be reciprocated in accordance with the -formation of the cam track. e

"Forthe purpose of heatingthe'filanient to give it what is termed a flashing period thereby an Bei ore the gripper members 54 are lifted, howe've'n-it' is obviously necessarythat "thegripper healing the filamentary wire, a resilient contact plate 93' isiprovided. This contact is carried. by 1 posts 94 ofinLsulative material securedin aper tures or bores 95 in the base plate 10. 7 The posts 94" are I hollow and conductive l rods 96 are dis posed therein having (their upperends secured by tap bolts 97 to the contact plate 93. The

lower ends of the rods are providedwith a con I 'ductive cross piece 98 and whelical springs 99. dicenergy through'the coiled section 36 a second. 7

resilient contact plate 1041s provided to -engage with the cam followers'86;which are part of the lower coill gripping memberslsee Fig. 24);Th

contact plate 104 may be'securedby tap bolts I 105 to the base plateand ja conducto'r 106 is provided to complete the electrical'circuit' in conjunction with the conductor 102-31 In order .to'

avoid short circuiting vbetween thev adjacent portions of. the machine and the coils throughwhich the electrical energy. is to pass, the flange 16 carrying the'cam surface 17"is divided-to provide segment 106 .(see' Fig; 6), this segment being spaced from therest of the flange anclinsulated by'reason of the collar 15 permits. the cam to make contact without short circuiting. ,Thecam 18 which actuates the pins 67 is. also provided with a segment107 '(see Fig; 5) insulated at 108 and 109 from the rest of the cam 18.

.The foregoing gives a detailed *description 'ofthe various operative parts oi the coil stretching deviceiand before describing the same'inconnectionwith the coil-winding machine the following description relating to the operation ,of the coil stretching machine is given.

Operation of coil stretching mechanism Referring to Fig.2 it will'be seen that the plate 68- is so-pos'itioned'as to arrange the aperture '73 beneath the chute 53. When the coil stretching device is aligned "with the chute 53 a coiled fila mentary section then drops into-the casing 47,

passing the upper jaws which I are 'open and the final or unloading position the cam 18 operates.

lower end of the filamentary section is-supported bythe lowervplate 84, thelower jaws also being As shown in the drawings, when the filamentary section is received at the loading position the head 69 carrying the upper gripper members is in a raised position. The machine may-then be indexed through .its cycle in a series of intermittent movements at which time the plunger riding on the cam 13 is allowed'to dropthus lowering the, head 69' and positioning the gripper jaws around the: upper end of the. filamentary section During this movement the upper cam 17 en; gages theboss 77 so that the downward movement of the head is positive. When the head reaches its lower position the tubular section 51 of the casing 47 moves downwardly "in opposition to the action of the spring 52. i

While the head is thus lowered the pins'67 are moved in accordance with the cam track 18 and the jaws 61 and 62 are closed to grip the upper end of the filamentary section at which time'the cam follower 86 on the lower slide plate moves to cause, the pin 83 to move away from between the arms of the gripper members allowing the jaw faces 88 and 89 to grip the lower end'of the filamentary section.

During this movement the lower slide plate 84 moves in the direction of the arrow X and as the carrier D rotates the lower and upper jaw members are separated thereby stretching the filamentary section a predetermined amount which is determined byythe amount of raise or i drop of the cams 13 and 17'respectively. The

As the carriermoves andthe coiled filamentary section is stretched,'the stretched section passes to position between the contact plates 93 and 104 so that electrical energy will pass through the stretched section heating it to give it'what is termed a fiashing orannealing treatment. As the carrier moves the stretched section to the to open the upper gripping jaws'and position the slide plate 68 with its aperture in position to admit another coiled filamentary section and the lower slide plate 84 is moved; in the direction oflthe arrow Y causing the pin 83 to-open the jaws,

the movement of the plate being continued until the aperture registers beneath the stretched section as the jaws open, thus releasing the stretched section for discharginginto a suitable receptacle 110...

' Before the carrier moves the stretching device to position to receive another section, however,

the plate 84 moves in the direction of thearrow Patent No. 1,795,767 and includes a pair oiiorce rollers 120 and 121; the upper roller 120 being mountedin a hearing plate 122,'the lowerroller work 123 of the machine.

opposite end 144, by'reason-of the stop'149 beingmounted in suitable hearings on the frame The rollers 1 20 and 121 are driven in opposite directions by. suitable means, (not shown).

and frictionally engage a filament wire 124 which is drawn from a spool 125 after .passing in a bight around a measuring roller or drum 126 which is mounted on a suitable support or bracket 127' secu'red to a bed plate 128 ofrthe coil winding machine. As thewire passes between rollers 120 and 121 itenters a cavity in one end of a die rod 129. The cavityand the actual end of the die rod are too small for illustration in the-present drawings, but this operation is, how i ever, well known in coil winding and clearly shownin the above mentioned patent.

v The said die rod is mounted in a holder 131 and is adjustable endwise by means of suitable set-screws; and is provided with other adjustand vertical movement:

ments for sidewise through the agency of suitable adjusting means. No further description of the actual 'coil winding mechanism is thought to be necessary.

The present-coil stretching mechanism, however, operates in conjunction with the coil cutting-mechanism employed as part. of the coil winding machine and an improved form of coil cutting mechanism is shown in Patent No.

1,783,626 and is likewiseshown in the coil winding machine in the present drawings.

The coil cuttingmechanism as shown in the abovementioned patent and illustrated'herein includes co-r'elate d machine elements which operate to'sever a coiled section without applying excessive stress on the wire which rotates the measuring drum. in the cutting of coiled sec tions on the mandrelless coil winding machine, 7

it is desirable to measure the wire previous to cutting'and this operationis performed .byutilizin'g the" measuring drum to actuate cutter mechanism, thus each coiled section will have therein the samelength of wire.

The mechanism shown in Patent No. 1,783,620 1 is adaptedto operate'the present coil stretching mechanism since the coil cutting elements shown include a reciprocating member which is utilized-to operate a pawl and ratchet which ro- CoiZ cutting mechanism The coil cutting mechanism which .is in fact a coil discharge mechanism includes a cutter 133 (see Fig. 1a) mounted ona plunger 134 reciprocal vertically in a guide plate 135. Between a the wire coiling cavity of the die rod 129 and the cutter is a tubular guide 136 so that the at147 and' having an arm 148 normally held against'a stop 149 by spring 151 thus an; en-

tates the carrierof the coil stretchingmachine.

formed continuous coil. is guided fromthe dieto latch consists of a rocker member l4'6pivotd gag'ement with one end of an arm 152 of the rocker member 146 willserve to depressthe and rock the lever 141 while an engagement or the opposite side of the arm 152 will permit the rocker member to move without actuating the lever 141. I h I It will therefore be evident that by engaging tuated to lift the plunger 134 and cause. the

the rocker arm'146 the lever 141 may be. ac- 15 a knife or cutter 133. to sever'a coil.- The knife moves across the orifice at-theend of the tube 136- the edge of which serves as a bed knife. A spring 153 disposed between a Shoulder 154 and a collar 155 on the plunger operates, to

normally return theplunger .to its lower posi-" tion.

cutter coil w ter mu It will be appreciated that the; present be positive and instantaneous. y

In thepresent invention wherein the coil is insorted into a'coil stretching machine the cutter is arranged so as to discharge the. coil into the chute 53 and acts asa coilfeedingmeans for the coil stretching machine. The mechanism for severing l the coil is, in the present, invention, utilized to operate the coil stretching mechanism;

i. e., intermittently rotate the carrier and consequently cause the. various cams toperform their functions as above described. l v

The coil severing mechanism which ed as a'whole bythe reference letter. B may I comprise a measuring drum 126 provided with a gear wheel156jin: mesh with a change gear or idler157which is disposed in mesh with a gear wheell153 secured to a shaft- 15 9. The shaft 159 is provided with a cam member 161 having a cam surface 162 and a drop portion 163. The said cam engages'a trigger member 16.4 journaled-at 165ina bearing 166. One end 167 ofthe trigger is connected 'by spring 168 to a projection 169; the said spring operatingto hold alug 171 at the opposite end of the trigger member, normally) engaged withthecamsurface 162. 'Onthe trigger member oppositeto the lug 171 is. provided a lug 172 engageable with a lug 173 atthe free end of a latch piece174, the latch piecebeing pivoted at 175 on a slideiplate 176. A spring 177 is provided to normally urge the latch piece against a stop pin 178 so as to be in position to engage the lug 172 of the trigger .164; The latch piece 174 is mounted on and is mov- "able with the plate 176 which is slidable in guides 179 and181. .Itwill be understood that the trigger .164 which is mounted on the bearing 166 in? ftegral with the guide 181 is stationary, the said guide being secured to the bracket127.

A spring 182secured to a pin 183 projecting from the slide plate I and a pin 184 securedto the guide 179 normally urges the plate in the direction ,of the arrow XX sothat when the 2 the latch piece 174 and holds the slide plate in operative position so that when the trigger 164 is' released the potential energy of thespring will cause the impact member185'to "actuate the 1ever 141.. The above nientioned'meansforactuating the slide plate'176 so as to' extend the spring may comprise mechanism in'the form of a rotatable head 187 constituting what maybe termed, triggersetting mechanism. 7 The head 187 is, mounted on 'a'shaft (not shown) and is continuously driven by suitable'motion transmitting mechanism connected with a motor (not shown) which, drives theother operating 'elements of the machinefas for example, the force drum 126. l 1

must sever the coil as moves from the 1g therefore the action of the cutis indicat rollers? 120 and 121 which drive the wire into the coil winding die thus pulling the wire from the spool and causing a. rotation ofthe measuring Thehead187 is provided 188 disposed eccentric to the axis of rotation" of 1 the head. Thispin is so arranged as to enter a :notch 189 in the slide plate 176, thus as the pin rotates with the head the slide plate will be carried'in the direction of the arrow-YY so as to e ready for actuation; 4 v -t necessary, however, to provide means for retracting the pin from its operative path with a projecting pin after it the notch 189ior holding the same retracted to permit anumber of revolutions of the head 187. This is accomplished by making the pin la -retractable in the head and having'a cam face 191"extending from theslide'plate I76, in

192 of the cam and move inwardly until an. inner notch on the pin is engaged by suitablemecha- .nism (not shown), which'mechanism operates to release the pinagain at' a definite point of its rotation with the head. This mechanismis clear 1y shown in the above mentionedpatent and further description is theneior believed to'be unnecessaryherein. a h I 1 h It will be evident from the foregoing thatlan actuation of the coil cutting mechanism Ef. causes a reciprocating movement of the plate 176 and an end 193 of the slide plateis'utilized to,operatesa1push rod 194 mountedinbearings 195 and 196 mounted on the bed plate-128 of "the coil Winding machine; The base plate 10 off'the v the path of rotation of the pin 188st) thatasthe 7 pin leaves the notch189 itwill engage a bevelface coil stretching machine is so arranged that it may be removably 'attached 'to the bed plate 128 of the coil winding machine. x Oneend or the push'rods 1941s provided with a finger 197 and an adjustable, contact member 198is provided at the end 193 of the slide plate 176. "Adjacent to the opposite endof the push rod is provided a contact piece 199 engageable with a ward 201 on a slide member 202 which is re-, tained by pins 203 disposed in "slots 204. The free:

end of the slide member is provided with'a pawl 265 engageable with the ratchet wheel 43 integral with the hub 4103f the coil stretching machine.

with the usual spring 297 to hold it for engagement with the ratchet, wheehior the purpose of retaining the carrier oftlie coil stretching machine against movement. After eachactuation of the ratchet wheel anindex mechanism is provided including: the toothed retainer wheel'44 which is engaged bya dog 208 tensionally held135 against the said wheellbyspring 209; p 1 l 1 r 1 From the foregoing it will be .evident'thatthe present coil stretching device may, as in the illus- A spring 206 is provided to urge the ratchet into its operative position and the ratchet isprovidedtrated embodiment of the'invention, be disposed 5 adjacent tdmechanism capable of imparting a reciprooative moveinent'as is the case of the slide plate-176 of the coil cutting mechanism.

In operation therefore the toil winding Inachineinay'be actuated to produce a continuous I length of coiled filament andwith each actuaw tion of'the cutting mechanism the carrier of the coil stretching device is operated to positiona coil stretching head beneath the guide53 and as'the coil winding machine operates to sever a coiled section of definite length,'this coiled section is led to the coil stretching machine whicl'ibperates synchronism' with the coil winding mechanism 'and'stretches coils as fast as they are delivered from the coil winding machine. I i

The coiled sections, when fedto the coil stretching machine, are as above described,

It will be appreciated that each coiled section being stretched is housed in a heat 'insulative casing and thatsuch casing is so formed as to maintain a wall surrounding the coil during stretching." v I It is to be understood that although coils may be stretched by heating in-the atmosphere, they. may befiashed or formed in a suitable forming gas, in which case the coil stretching device may 1 be enclosed in a bell jar 211 as indicatedin dotted lines inFig. Zhaving an inlet 212 for the entrance of a suitable forming gas.

7 Although a preferred embodiment of the invention is. shown and described herein it is to be set forth'in the appended claims. I

What is claimed is: 1. A machine for winding and stretching coiled filaments comprising mechanism for helically coiling a filament wire, aplurality of coil stretch ing devices, means for cutting coiled filament into sections of predeterminedlengths, means for feeding'said sections, means for movingastretching device'into operation relative with said mechanism, means for depositing a coiled section 'in' astretching device, means for removing'said device,1means forpositioning another device to receive a coiled section and means for operating anism, 'means for depositing a coiled section in a stretching device, means for progressively moving said devicesinto operative relation with said mechanism to receive coiled sections and means for actuating said devices during movement away from said mechanism;

3.' A machine for winding and stretching coiled .filaments comprising mechanism for helically coiling a filament wire, a plurality of coil stretch- .ing devices, meansfor cutting coiled filament into, sections of predetermined lengths, means for feeding said sections, means'ior moving a stretching device into operative relation with said mechanism, means for depositing a coiled section in a stretching device, meansfor progressively moving said devices into operative relation with said mechanism to receive coiled sections, means for actuating said devices during .movement away from said mechanism and means for discharging said stretched sections.

g 4. A machine for winding and stretching coiled filaments comprising mechanism for helically coiling a filament wire, a plurality of coil stretching devices and means 'for stretched sections. understood that modifications may be made therein without departing from the spirit and scope of the invention as coiled section'in a stretching device, means for progressively" moving said devices into operative relation with said mechanism'to receive coiled sections, means for actuating said devices during movement away from said mechanism and means for-heating said coiled sections while "in -said stretching device.

5. A machine for winding and stretching coiled filaments comprising mechanism for helically coiling a filament wire, a plurality of coil stretcl ing device's', mean's for cutting said-coiled filament into-sections o f--predetermined lengths, means for feeding saidfsections, means for moving a stretching device into operative relation 'withsaid mechanism, mean's'fo'r depositinga coiled section ina stretching devicefmeans for progressively moving said devices into operative relation with said mechanism to receive coiled sections, means-for actuating said devices. during movement away from said mechanism, means-for heating said coiled sections while in said stretch 6. In combination with a winding machine for ,producinga continuous length of coiled wire having intermittently operated cutter mechanism to "sever said coiled ,wire into coiled sections of predetermined lengths, a plurality of devices for in-. creasing the lengths of said .coiled sections and means controlled by said cutting mechanism for positioning a device to receive a coiled section."

7. In combination with a coil winding machine;

forproducing a continuous length of coiled wire having intermittently operated, cutter mechanism to sever said coiled wire into coiled sections of predetermined lengths, a pl'uralityof coil stretch-V ing devices andmeans cooperatingwith said outter-mechanism for effecting a 'movement ofv a stretchingdevice to position ltoreceive a coiled section. a

for producing a continuous length of coiled Wire having intermittently operated cuttermechanismto sever said coiled wire into' coiled" sections of predetermined lengths, a plurality of coil stretch-f ing devices and means for actuating said devicesi during their travel'to stretch-coiled sections.

9. In'combination with a coil winding machine for producing a continuous length of coiled-wire having intermittently operated "cutter-mechanism to'sever said coiled wire into coiled sections of predetermined lengths, a plurality of coil stretching devices and means forheating said sections during the stretching operation.

10. In combination with a coil winding machine having cutter mechanism to sever a coil into sections, a .plurality of devices forincreasits ,dischargingf said j ing the lengths of said coiled sections, andme'ans operating in timed relation to said cutting mechanism for positioninga device to receive the severe'd, section for a stretchingv operation 11., In combination with a'coil'winding machine having cutter mechanism to sever a coil into sections, a plurality of coil lengthening devices, and means operating in timed relation to said cutting'mechanism to position a device to ing operation and means stretched sections i v a 12. A machine for cutting an indefinite length receive a, severed coiled section fora lengtheiofor I discharging a 1 15 8. In combination witha coil winding machine cable member for moving coiled sections.

13. A machine for cutting an indefinite length of coiledfilament into sections of predetermined lengths comprising a cutter, a reciprocable member for actuating said cutter, a conveyor, a plurality of coil stretching devices mounted on said COllVtlYOlQHlGELDS for intermittently rotating said said devices to receive conveyor, said recipr'ocable member operating' 15. A'coil stretching device comprising a tnbu- V lar casing, coil gripping heads at oppositeends of said casing, means for holding said jaws open to permit, the passage of a coiled section end- Wise into said casing, means for closing said jaws to grip the opposite ends of said coiled section,

means for separating said heads to stretch said coiled section and means for heating said 7 stretched section. V

16. A coil stretching device comprising a tele- V scopic casing, means for holding the casing extended, coil gripping heads at opposite ends of said casing, means formoving said heads toward each other to collapse the casing and dispose the ends of a coiled section within the casing in the giipping heads, means for actuating the heads section.

- 'JOHN WAHLBERG.

90 to grip the ends of the coiled section and means J A. for separating the heads to stretch the coiled ,o

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